package hello;

class Circle{
	void printArea(double r){
		System.out.println(r*r*3.1416926);
	}
}

class Rectangle{
	void printArea(double a,double b){
		System.out.println(a*b);
	}
}

public class java {
	public static void main(String args[]){
	Circle circle=new Circle();
	circle.printArea(100);
	Rectangle rect=new Rectangle();
	rect.printArea(100,65);
	}
}
